Subject Computer Networks COS2626
Assignment 03 Semesters 1 & 2
Unique Assignment number 752700 (Semester 1)
742425 (Semester 2)
Study Material Chapters 1-12
Number of Questions 19
Question 1 [3]
Identify the CORRECT layer of the OSI (Open Systems Interconnection) Model.
1.1 The physical layer, is the simplest layer of all and is responsible only for sending [1]
P26 bits via a wired or wireless transmission.
1.2 The network layer moves messages from one node to another until they reach [1]
P25 the destination host.
1.3 Protocols such as HTTP, SMTP, POP3, IMAP4, FTP, Telnet, and RDP are used [1]
P23 at the application layer.
Question 2 [4]
Answer the following questions regarding ports and sockets
2.1 Port numbers are divided into THREE types. Name these THREE types. [3]
P131 a. Well-known ports
b. Registered ports
c. Dynamic and private ports
2.2 In the following diagram, the ? denotes a request for TELNET connection on [1]
P131 port 23.
1|Page
Assignment 03 Semesters 1 & 2
Unique Assignment number 752700 (Semester 1)
742425 (Semester 2)
Study Material Chapters 1-12
Number of Questions 19
Question 1 [3]
Identify the CORRECT layer of the OSI (Open Systems Interconnection) Model.
1.1 The physical layer, is the simplest layer of all and is responsible only for sending [1]
P26 bits via a wired or wireless transmission.
1.2 The network layer moves messages from one node to another until they reach [1]
P25 the destination host.
1.3 Protocols such as HTTP, SMTP, POP3, IMAP4, FTP, Telnet, and RDP are used [1]
P23 at the application layer.
Question 2 [4]
Answer the following questions regarding ports and sockets
2.1 Port numbers are divided into THREE types. Name these THREE types. [3]
P131 a. Well-known ports
b. Registered ports
c. Dynamic and private ports
2.2 In the following diagram, the ? denotes a request for TELNET connection on [1]
P131 port 23.
1|Page
